Free tool
Video Aspect Ratio and Size Guide
The right ratio and resolution for TikTok, Reels, Shorts, YouTube and more — plus a calculator to crop your images before you animate them.
Crop and resize calculator
Enter your image or video size to see how to crop it for the platform above — before you generate, so the AI doesn’t have to invent missing areas.
Recommended sizes are common best practice at the time of writing. Platforms update their specifications, so check each platform’s help pages for the latest requirements.
Why aspect ratio matters for AI video
AI video tools generate the frame you give them. If you animate a horizontal image and then crop it for TikTok, you throw away most of your shot — and the part you keep may be blurry. Choosing the right ratio before you generate gives sharper, better-composed results and saves credits.
Quick reference
- 9:16 (vertical): TikTok, Instagram Reels, YouTube Shorts, Stories.
- 16:9 (horizontal): YouTube, websites, X and presentations.
- 4:5 (portrait): Instagram and Facebook feeds.
- 1:1 (square): feeds on most platforms.
- 2:3: Pinterest.
- 21:9: cinematic trailers and film-style intros.
Tips
- Create your first frame in the final ratio instead of cropping later.
- Keep important elements inside the safe zone, away from on-screen buttons and captions.
- Upscale only your final, selected clips.
Learn the full workflow in our image-to-video guide.